The UI design and user interaction optimization of the smart energy cloud platform have become a key research direction to improve the overall value of the system, but the current interface design still needs to be improved in terms of functionality and visibility. In this study, the analytic hierarchy process (AHP) and the fuzzy comprehensive evaluation method (FCE) were used to construct the UI evaluation model, and the user interface (UI) design of the platform was systematically evaluated and optimized. AHP was used to weigh the design factors, and the FCE model was employed to evaluate the three UI design schemes to screen out the best one. Combined with the user heatmap data, the visual design of the high-click area was optimized, and the platform score was increased from 82.396 to 87.471. The research results verify the effectiveness of the combination of AHP and FCE in the evaluation and optimization of platform UI design, and provide a scientific basis and practical reference for the user experience improvement of other intelligent cloud platforms.